QUANTUMONLINE.COM SECURITY DESCRIPTION:  UBS AG, Enhanced Appreciation Securities due 5/28/2004, issued at $1000 principal amount per Note, and linked to the performance of the S&P 500 Index. The holder will receive no payments prior to maturity. At the maturity date of 5/28/2004 the holder will receive a cash index return payment reflecting the return of the S&P 500 Index (starting level 919.02 on 4/23/2003) which may be positive or negative. Positive index returns for the Index will be tripled, subject to a maximum payment at maturity of $1,160 per note. The notes are exposed to the full downside price risk of each basket stock. The securities are medium-term notes issued by UBS AG. See the IPO prospectus for further information on the maturity payment and the Enhanced Appreciation Securities by clicking on the ‘Link to IPO Prospectus’ provided below.

Company's Online Information Links

HOME PAGE:     http://www.ubs.com/ (This parent company URL is for reference only and does not have specific information on the security.)

Company's Online SEC EDGAR Filings

Company's SEC EDGAR Filings

Go to SEC Filings

Company's Email Address Links

Email Address	investor-relations@ubs.com
Email Contact Form on Website	Go to Email Form

Foreign Address and Phone Numbers

Address:   Bahnhofstrasse 45, Zurich, Switzerland
Main Phone Number	+41-1-234-41-00
Fax Number	+41-1-234-34-15
Inv Rel Phone Number	+41-1-234-4360

Address and Phone Numbers

U.S. Representative	UBS New York
Address:   1285 Avenue of the Americas, New York, NY 10019
Main Phone Number	212-821-3000
Fax Number	212-713-1381